Modeling the heat development in hydrating CPB structures

被引：87

作者：

Nasir, Othman ^{[1
]}

Fall, Mamadou ^{[1
]}

机构：

[1] Univ Ottawa, Dept Civil Engn, Ottawa, ON K1N 6N5, Canada

来源：

COMPUTERS AND GEOTECHNICS | 2009年 / 36卷 / 07期

关键词：

Cemented paste backfill; Heat of binder's hydration; Heat transfer; Temperature history; Modeling; Tailings; Coupled process; CONCRETE;

D O I：

10.1016/j.compgeo.2009.05.008

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Cemented paste backfill (CPB) is a mixture of dewatered tailings, hydraulic binders and water. In addition to contributing to the stability of mine workplaces, CPB greatly benefits the environment by minimizing surface tailings disposal. Hence, it has become one of the most commonly used ways in mine backfilling around the world. Temperature can significantly affect the mechanical properties of cemented backfill. A source of heat in CPB is produced by binder hydration. Hence, a FLAC based numerical model is developed to predict and analyse the heat developed by hydrating CPB structures. To validate the model, results of the developed model are compared with three case studies (mathematical, laboratory, and field investigations). The validation results show a good agreement between the developed model and these cases. The effects of stope geometry, thermal properties of both rock and CPB, filling rate, binder content and initial boundary conditions are also investigated. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1207 / 1218

页数：12

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